Permutation wheel-tumbler for locks.



J. J. MURPHY.

PERMUTATION WHEEL TUMBLER FOR LOCKS.

APPLICATION FILED APR. 6, 1908.

Patented Oct. 13, 190 8 (gm .cxw c THE uaizms PETERS co-, wAsHuyamN. n.,c.

UNITED STATES PATENT OFFICE.

JAMES J. MURPHY, OF TERRYVILLE, CONNECTICUT, ACSIGNOR TO EAGLE LOCK CO., OF

TERRYVILLE, CONNECTICUT, A CORPORATION.

PEBMUTATION"WHEEL-TUMBLER FOR LOCKS.

Specification of Letters Patent.

Patented Oct. 13, 1908.

Application filed April 6, 1908. SerialNo. 425,465.

T 0 all whom it may concern:

Be it known that I, JAMES J. MURPHY, a citizen of the United States, residing at Terryville, in the county of Litchfield and State of Connecticut, have invented a, new and useful Improvement in Permutation 1 V heel- Tumblers for Locks and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1 is a detached view in elevation of my improved permutation wheel-tumbler. Fig. 2 a view thereof on a larger scale with its cap removed. Fig. 3 a view of the tumbler in vertical section on the scale of Fig. 2 but with its cap in position.

My invention relates to an improvement in permutation wheel-tumblers for looks of the type shown and described in United States Patent No. 858,744 granted July 2nd, 1907, on my application, the object of my present invention being to produce for use in such locks a wheel-tumbler constructed with particular reference to permanence of adjustment when set on any combination.

With these ends in view my invention consists in a ermutation wheel-tumbler for locks as wi l be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ a radially movable segmental locking-dog 2 located between and guided by two short pillars 3 and having its inner edge toothed and concaved to conform in curvature to the curvature of the adjustable annular center 5 of the tumbler, the said center being formed with a bearing-opening 6 receiving a hub on which all of the tumblers are mounted but which is not shown. The dog 2 is formed with a large centrally arranged notch 7 leading into it from its conveXed outer edge and provided for the reception of a locking hub 8 having a square keyopening 9 and formed with a flat face 10 which is normally turned away from the bottom of the notch 7 which is engaged by the periyhery of the hub as shown'in Fig. 2 for positivelyholding the dog 2 at the limit of its inward movement in which position the teeth. of the dog are engaged with those of the adjustable bearing center 5. When the hub 8 is turned so as to bring the face 10 opposite the bottom of the notch 7 the dog 2 is free to be moved outward by means of its springs 11 the free ends of which enter corresponding notches 12 formed upon the inner face of the ends of the do these springs being located within the shallow annular chamber 13 of an annular tumbler-body 14 which is provided with an outer flange 15, a concentric inner flange 16 and a cap or plate 17 which rests upon these flanges and incloses the chamber 13. A segmental plate 18 located within the body 14 at a point directly opposite the lug 2 is formed with a locking notch 19 which receives the part of the lock employed to lock the wheel-tumblers. The adjustable center 5 is formed with a segmental slot 20 for the reception of the stud (not shown) forming another partof the look as fully disclosed in my prior atent.

It will e understood that when the hub 8 is turned to engage its peri hery with the bottom of the notch 7 in the o 2, any swift turning and sudden stoppin of the tumbler cannot possibly cause the 0g to let go its hold. upon the bearing center 5 so that the setting of the center 5 with respect to the tumbler 14 will be permanent, while at the same time it is very easy to set the tumbler to a new permutation by merely turning the hub 8 so as to bring its flattened face 10 into opposition with the bottom of the notch 7.

I claim 1. In a permutation wheeltumbler for permutation locks, the combination with an annular chambered body, of an annular bearing-center located therein and having its eriphery toothed, a radially arranged 0g mounted in the body in position to engage with the teeth of the said bearing-center, a hub mounted in the said body and formed with a clearance face, and springs located within the chambered body and engaging with the dog for moving the same radially outward to release the bearing-center when the clearance face of the hub is brought into its clearance position.

2. In a permutation wheel-tumbler for permutation locks, the combination with an annular chambered body, of an annular bearing-center located therein and having its periphery toothed, a radially arranged dog mounted in the said body in position to engage with the teeth of the said bearing-center, a hub mounted in the said body, located within the said notch in the dog and formed with a clearance-face, springs engaging With In testimony whereof, I have signal this the ends of the dog for moving the same raspecification 1n the presence of two subscribdlally outward to release the beer1ng-eenter mg wltnesses.

when the clearance-face of the hub is brought JAMES J. MURPI I Y. 5 into opposition with the bottom of the said Witnesses:

notch in the dog, and means for guiding the R. J. PLUMB,

dog in its radial movement. OTIs 13. 110mm. 

